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摘要：本文研究了A-O-A-O多级生化法装置，主要研究NH3-N的去除效果。考察了水力停留时间，进水浓度，溶解氧等运行条件对水解酸化与好氧阶段处理效果的影响。并在串联各系统，连续进水的条件下，考察了系统在不同HRT，不同COD浓度的运行情况。实验表明水解酸化阶段各指标的去除率不高，为10%~20%，去除降解主要是在生物接触氧化池中进行好氧阶段。废水浓度的上升可以提高其污染物的去除率，但当COD进水浓度高于1000mg/L时或NH3-N在高于90mg/L时，系统将遭到破坏，去除率开始下降。DO为4mg/L~5mg/L时，效率最佳。采用12h的停留时间，效率较高，而且可以达到相关规定的出水要求。20378
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毕业论文关键词：A-O-A-O法；造纸废水；氨氮的去除；生物膜法；水力停留时间（HRT）
Research about treatment techniques of NH3-N removal of waste water for the pulp and paper
Abstract: In this study, multistage biochemical process are applied to the treatment of papermaking wastewater, mainly focus on the removal of ammonia.Acclimating activated sludge is the first thing to do, and after the activated sludge has been successfully domesticated, research on the effect of hydrolysis acidification process and aerobic phases of research, and mainly record the results under the different HRT, influent concentration, dissolved oxygen and other operating conditions for both of the processing. Regulating water flow system were studied under two residence time (12h and 24h) operation, and take the two influent COD concentrations to explore the results.Experimental results show that the removal rate of each index in hydrolysis acidification stage is not high, 10% to 20%, and removal effect is mainly of the degradation of biological contact oxidation pool aerobic stage. Rising concentrations of wastewater pollutant can improve the removal efficiency, but when the influent COD concentration is higher than 1000 mg/L or NH3-N is above 90 mg/L, the system will be destroyed, the removal rate began to decline.And 4mg/L ~ 5mg/L of DO is optimum concentration.Using a residence time of 12h because of its high efficiency, and still can reach the relevant provisions of the water requirements.
Key words: A-O-A-O biochemical process; NH3-N removal; papermaking wastewater; biomembrance process; Hydraulic retention time(HRT)
目 录
1 绪论 1
1.1 课题背景 1
1.2 造纸废水概述 1
1.2.1 造纸废水的产生 1
1.2.2 造纸废水的水质特征 2
1.2.3 造纸废水的危害 3
1.3 造纸废水处理方法概述 3
1.3.1 造纸废水的物化处理技术 3
1.3.2 造纸废水的高级氧化技术 3
1.3.3 光催化法 4
1.3.4 生物法 4
1.3.5 小结 5
2 实验方法与过程 6
2.1 实验方案论证 6
2.2 实验方案原理 6
2.2.1 水解酸化机理 6
2.2.2 生物接触氧化法处理机理 7
2.2.3 生物脱氮的机理 7
2.3 实验工艺流程和装置 8
2.3.1 1号及2号水解酸化反应器(A) 8
2.3.2 1号及2号好氧反应器(O) 9
2.3.3 沉淀池 9
2.4 实验废水 9
2.5 实验装置的启动 9
2.5.1 A1及A2的污泥接种及驯化 9
2.5.2 O1和O2的污泥接种及驯化 10
2.6 实验测定项目及分析方法 10